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Finding the Fourth Proportional to 262,866.20, 394,040.10 and 129,637.40

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Solution

The fourth proportional to 262,866.20, 394,040.10 and 129,637.40 is: 194,328.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,866.20 : 394,040.10 = 129,637.40 : x
  2. Step 2: Convert to fraction form
    262,866.20/394,040.10 = 129,637.40/x
  3. Step 3: Cross multiply
    262,866.20x = 394,040.10 × 129,637.40
  4. Step 4: Simplify right side
    262,866.20x = 51,082,334,059.74
  5. Step 5: Solve for x
    x = 51,082,334,059.74/262,866.20
  6. Step 6: Final answer
    x = 194,328.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.